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  • Title: Targeted genome regulation and modification using transcription activator-like effectors.
    Author: Scott JN, Kupinski AP, Boyes J.
    Journal: FEBS J; 2014 Oct; 281(20):4583-97. PubMed ID: 25124066.
    Abstract:
    Transcription activator-like effectors (TALEs) are immensely powerful new tools for genome engineering that can be directed to bind to almost any DNA sequence of choice. They originate from the Xanthomonas species of plant pathogenic bacteria and, in nature, these proteins increase the virulence of Xanthomonas. However, in 2009, the DNA binding code of TALEs was deciphered and, subsequently, TALE proteins have been exploited for many diverse applications. Custom TALEs that target almost any required DNA sequence can be readily constructed in < 1 week. One major application is gene editing: TALEs fused with the Fok I endonuclease catalytic domain can induce double-stranded breaks at a chosen genomic location, similar to zinc finger nucleases. Designer TALE transcription factors have also been developed by linking TALEs to a transcription AD, such as VP64. More recently, TALEs have been developed that can repress transcription, bind methylated DNA or act as fluorescent chromatin probes. In the present review, we describe the assembly of designer TALEs, their expanding range of current and potential future applications, and briefly discuss alternatives, namely, zinc finger nucleases and clustered regularly interspaced short palindromic repeat/clustered regularly interspaced short palindromic repeat associated protein 9.
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